Date: 27/5/2022 2:1
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PY-A-4386

Crosman .177-Cal Steel Breech Kit, Fits 1377, 1740, 1760 & PC77 Air Guns

4.5 (103 reviews)
Crosman .177-Cal Steel Breech Kit, Fits 1377, 1740, 1760 & PC77 Air Guns

Crosman .177-Cal Steel, Image 1

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$44.99

List Price $52.99Save $8.00(15%)
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$44.99
  • Crosman .177-cal. steel breech kit
  • Fits Crosman airgun models 1377,* 1740, 1760 and PC77
  • Will accept the Crosman LPA MIM rear sight

The original rear sight that comes with any of these airgun models will no longer fit on the steel breech. If you want a rear sight, the Crosman LPA MIM rear sight is made for this kit (CR-2300-010[PY-A-4385]).

*This breech does not fit older model 1377 air pistols with a sliding breech cover.


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Item Code: CR-1377SBPK [PY-A-4386]

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Price

$44.99

Specs

Weight0.15 lbs

Average Customer Review

4.5 (103 reviews)
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5.0 5.0

4.0 4.0

Verified Purchase

Things I liked:

Everything.

Things I would have changed:

I would make this the factory installed breech and never, ever subject another customer to the worthless plastic breech that is the current standard.

What others should know:

It is worth the upgrade.

5.0 5.0

4.0 4.0

Verified Purchase

Things I liked:

Great product, but I do it consider this an upgrade it's more of a retro part in order to utilize optics. The plastic breech is good and has no problems loading pellets. But with the steel breech a washer must be used to raise the breech screw in order to eliminate the pellets from jamming. The paper washer is the way I fixed the pellet jamming problem. Also the paper washer cost nothing, just take your time and cut some hard paper and problem solved.

Things I would have changed:

I would add some paper washers in the breech kit.

What others should know:

Pellet jam occurs with this retro/upgrade.

5.0 5.0

4.0 4.0

Verified Purchase

Things I liked:

This gives you the ability to mount optics on your 1377. It improves and already accurate pistol. I think it makes pumping the gun easier as it stiffens the overall barrel breech connection. The pistol feels a lot more robust.

Things I would have changed:

The biggest issue with this kit is that breech screw hole. The pellet will hang up and requires a lot of work to load properly. Crosman has know about this issue forever and just cannot seem to figure out how to include a simple nylon washer/spacers (like 3 cents guys- come on!) I was frustrated that they cannot include a slightly longer rear mount screw so the original sight can be utilized. (ok another 3 cents- but I would have GLADLY paid an extra quarter for those parts!) The barrel grub screw is WAY too long for the 1377 application and my dovetail to Weaver adapter had to be mounted in a way to accommodate the grub screw sticking up (I am going to find a shorter one in my screw collection and replace it. Crosman put lock tight on every screw EXCEPT the bolt handle threads (the one screw that actually NEEDS locktite)

What others should know:

This takes your 1377 from a cheap beginner pistol, to a serious contender. Yes it is expensive (taking the price of the gun to the $100 dollar range) but it makes a difference in what can be done. Be aware the directions are for the 22xx/23xx series and not really user friendly for the 13xx series. My transfer hort fell out and I had a Heck if a time figuring out which end went up (it only fits properly one way). You cannot reuse the stock sight as the included (and original screw are too short. The barrel band on the new version of the 1377 does not need to be loosened (it can't be loosened) and you need to remove the lower tube hammerspring retaining plug (and the spring will fall out). This is challenging to replace as you need to compress the spring and line up the cap holes AND start the screw! I'm not a beginner when it comes to airguns, but this took me about 45 minutes to complete (from removing the old breech to a completed project.

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  • elcue from USA asked:

    What adapter do you use to mount a red dot sight on the 1377 with the steel breach. I have bought dovetail to weaver adapters to mount a sight and they do not fit the dovetail. I for some reason I just realized it states in the description. (Does not fit 3/8", 11mm, Weaver or Picatinny dovetails/bases) Duhh on me! What is used to mount a red dot or scope if desired?

    • Jason from USA asked:

      Will this for the old 1389 backpacker?

      • Mark from USA answered:

        Compatible with Crosman .177-Cal Steel Breech Kit, Fits 1377, 1740, 1760 & PC77 Air Guns. No

    • Plinker50 from USA asked:

      Will this upgrade the older model with the sliding breech cover?

      • Shawn from USA answered:

        It says in the description that it does NOT fit the old version..

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    Compatible with Crosman .177-Cal Steel Breech Kit, Fits 1377, 1740, 1760 & PC77 Air Guns

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